Container diaphragm



FIG. 1 is a front perspective view of a container diaphragm.

FIG. 2 is a top view thereof; and,

FIG. 3 is a bottom view thereof.

The broken lines in the figures depict environmental subject matter onlyand form no part of the claimed design.

CLAIM I claim the ornamental design for a container diaphragm, as shownand described.